/**
 * Copyright (C) 2010 Sergey Grigoriev <s.a.grigoriev@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.gmf.dsl

import org.apache.commons.lang.NotImplementedException

/**
 * Delegates creation of the child node to the current node
 */
class BuilderBase extends BuilderSupport {

  def final ops = []

  def protected op(value) {
    if (value instanceof CharSequence) {
      ops << value
    } else if (value instanceof Map) {
      if (value.size() != 1) {
        throw new IllegalArgumentException('Expected a map with a single key-value pair')
      }
      ops << value
    } else {
      throw new IllegalArgumentException('Option should be a string or a map')
    }
  }

  protected void setParent(Object parent, Object child) {
  }

  protected Object createNode(Object name) {
    throw new NotImplementedException()
  }

  protected Object createNode(Object name, Object value) {
     this[name] = value
  }

  protected Object createNode(Object name, Map attributes) {
    this[name] = attributes
  }

  protected Object createNode(Object name, Map attributes, Object value) {
    throw new NotImplementedException()
  }
}
